Air-brake



(No Model.) 2 Sheets-Shet I.

T. V. NORRIS.

' AIR BRAKE.

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2 Sheets-Sheet 2.

(No Model.)

T, V. NORRIS.

AIR BRAKE.

Patented Oct. 22,1889.

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' UNITED STATES PATENT O FICE.

THOMAS V. NORRIS, OF ROCKFORD, ILLINOIS.

AIR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 413,205, dated October 22, 1889. Application filedNovemlier 16,1888. Serial No. 291,070. (No model.) 1

To aZZ whom it may concern.-

Be it known that I, THOMAS V. NORRIS, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented a certain new and useful Improvement in Air-Brakes, of which the following is a specification.

My invention relates to air-brakes adapted for use on all kinds of railway and other cars; and it consists of certain new and useful constructions and combinations of parts hereinafter described, and pointed out in the claims.

Referring tothe accompanying drawings, which form a part of this specification, Figure 1 is a plan View of my improved air-brake in operative connection with the running-gear of a car. Fig. 2 is an end view of the same surmounted by a platform. Fig. 3 is a View of a section, through the dotted line X X, of parts illustrated in Figs. 1 and 2. Fig. 4 is a longitudinal central vertical section, through the dotted line X in Fig. 1, of the compressedair cylinder and air-pump that operate the brakes. Figs. 5 and 6 are respectively plan and rear views of an eccentric and attachments for operating the air-pump and cylinder. Fig. 7 is a view of a vertical section, through the dotted line X of a part illustrated in Fig. 6. Fig. 8 is a View in detail of a Valve for opening and closing the compressed-air cylinder.

Like letters of reference indicate corresponding parts throughout the several views.

A is a car-platform, mounted on Wheels A A A by means of suitable truck=frames (not shown) and axles A B B are brakebeams. B are brake-shoes. B B are connecting-rods. B is a lever for operating said parts from B to B inclusive, when connected together, as shown.

C is a compressed-air cylinder, secured to the under side of a car by means of lugs O.

O is a piston adapted to operate in the cylinder O. i

C is a piston rod connected with the piston O and provided with jaws O to admit the free end of the lever 13 D is the cylinder of an a'i'rqaump, which is used for forcing air into the cylinder C.

D is a cylinder D.

piston adapted to operate in the D is a piston-rod connected withthe piston D to drive the same.

The pump-cylinder D opens intothe conipressed-air cylinder 0 through a valve D consisting of a seatD ball D and cage D The cylinder D is secured to the car by means of suitable lugs D The cylinder D is furnished with air by means of a valve E, consisting of a seat E, a ball E and a cage E is a tube for admitting air to the valve E. E is a perforated screen, which prevents dirt from entering the tube E F is a rotary valvea preferable form-consisting of a cylindrical plug F, havinga passage F extending therethrough, and a tubular seat F to support the same.

F is a crank, by means of which the valve is opened and closed.

Gis a'hanger secured to and depending .from the under side of the car-platform A.

G is an eccentric-lever provided withalug G branching therefrom, bymeans of which and a bolt G3 the same is mounted upon the hanger G. The lower end of the eccentriclever G has a longitudinal cylindrical socket therein to admit a part, to be described hereinafter, and the upper end thereof is embraced between the piston-rod jawsD ,wherein it is held by means of a bolt G which passes through them and an elongated slot G I therein.

H is a knuckle having a horizontal cylindrical opening extending therethrough.

H is a cylindrical shank integral with the knuckle H, of proper diameter to readily enter the socket in the lower end of the eccentrio-lever G, with which it forms a semiswiveljoint. The shank H is held in its socket by means of a pin H, which passes through a horizontal slot H therein and the lever G.

I is an eccentric secured to an axle A, and having the inner. end 1 thereof gradually tapered toward said axle.

I is an annular flange which serves to prevent the eccentric'strap, to be-described hereinafter, from coming in contact with the wheelhub.

I is an eccentricstrap hinge-jointed to the knuckle H by means of a bolt I and provided with lugs I, projecting horizontally therefrom, said lugs being perforated by means of horizontal openings therein.

J is a bell-crank mounted by means of a bolt J on the under side of the car-platform A.

K are connecting-rods hinge-jointed to the lugs I of. the eccentric-strap I by means of bolts K and to the arm J 2 of the bell crank J by means of a bolt K L is a brake-rod secured to the car in the ordinary manner.

L L are arms secured rod L.

H is a connecting-rod hinge-jointed to the arm J of the bell-crank J by means of the jaws M and bolt M and to the arm L by means of the jaws M and the bolt M N is a connecting-rod hinge-jointed to the crank F by means of the jaws N and bolt N and to the arm L by means of the jaws L and bolt L L is a lever for operating the brake-rod L.

Supposing the plug F of the valve F to be turned so that the passage F therein would be vertical, and the eccentric-strap I to be in position indicated by the dotted lines X in Fig. 6, the brake would be operated in the following manner: Press the free end of the brake-lever L from the car. The impulse of such pressure will be transmitted through the media of the brake-rod L, the arm L and the connecting-rod N to the crank F, which, being slightly turned thereby, will close the valve E, as shown in Fig. 4. The movement of the lever L above referred to, will also transmit motion, through the media of the rod L, the arm L, the connecting-rod M, the bell crank J, and the connecting-rods K, to the eccentric-strap J which. will be thereby carried downward from the position indicated by dotted lines X in Fig. 6 to the position there shown and engage with its eccentric I. Immediately after the engagement of the strap 1 with the eccentric I the eccentric-lever G will be reciprocated thereby, as indirigidlyto the brakecated by the dotted lines X in Figs. 4 and 7,

and the piston-rod D and piston D in the air-pump cylinder D, and thereby force air through the valve D into the compressed-air cylinder O,whereby the piston O and pistonrod 0 will be forced from the valve D and through the media of the lever B connecting-rods B B brake-beams B, and brakeshoes 13 brake the wheels of the car. To remove the brakes, press the brake-lever L toward the car, and the valve F will be opened and the eccentric-strap I disengaged from its eccentric I by reverse movements of the media connecting the brake-lever L with the said valve and eccentric-strap.

I claim- 1. In combination, an air pump, an eccentric mounted upon and taking power from the axle of a railway -truck, an eccentricstrap constructed and arranged in such a manner as to readily admit of being engaged with and disengaged from said eccentric while revolving, an eccentric-lever connecting said eccentric-strap with the piston-rod of said air-pump, a brake-rod L, the arm L, rigidly secured thereto, the rod M, hingejointed to said arm L, the bell-crank hingejointed to said rod M, and the rods K, hingejointed to said bell-crank and eccentric-strap, substantially as described, and for the purpose set forth.

2. In combination, the herein described compressed-air cylinder and air-pump having the operative parts and connections, as shown, an eccentric I, mounted upon and "taking power from an axle A, the eccentric-strap I mounted upon and depending from the eccentric-lever G, the brake-rod L, the arms L L secured thereto, the connecting-rod M, hinge-jointed to said arm L, the bell-crank J, hinge-jointed to said rod M, the rods K, hinge-jointed to said bellcrank and eccentrio-strap, the valve-crank F and the rod N, connecting the latter with said arm, substantially as set forth.

THOMAS V. NORRIS.

\Vitnesses:

L. L. MoRRIsoN, E. T. DOWLING. 

